mckay



S. R. McKAY DEMOUNTABLE mm FOR VHICLE WHEELS.

APPLICATiOK HLEI) JULY 28.15MB.

Patented June 17, 1919.

2 SHEETS-SHEET I.

,IicvenfOH W a? W flymr Kiwi.

S. R. McKAY.

DEMOUNTABLE RIM FOR VEHICLE WHEELS.

APPLICATION FILED JULY 2a. 1915.

1,306,828. Patented 11111017, 1919.

2 SHEETS-SHEET 2.

: jwen'for UNITED STATES PATENT OFFICE.

STEWART R. MGKAY, 0F CLEVELAND, OHIO, ASSIGNOR TO THE 'MCKAY COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

DEMOUNTABLE RIM FOR VEHICLE-WHEELS.

Specification of Letters Patent.

Patented JuneIY, 1919.

Application filed July 28, 1916. SerialCNo 111,785.

To all whom it may concern.

Be it known that I, Srnwmrrlt. MQKAY, a citizen of the 1 United States residing at Colonial Heights, Cleveland, inthe county of Uuyahoga and State of (Dhioyhave invented a certain new and nsefulihnprovement in Demountable Rims for 'Vehicle- Wheels, of which the following is a full, clear, and exact description.

This invention relates to demountable lire-carrying rims for automobile wheels.

The objects are toprovide a rim capable of carrying an initialed pneumatic tire as well when the rim is ofl" the wheel as when on the wheel; to so construct the rim that the tire may be easily put onto and removed therefrom; and to provide also suitable means by which the rim, with-a tire there on, may :be readily placed upon and securely held upon a wheel ;rim or readily taken therefrom when desired.

The invention consists; in the construction and combination of parts shown in the drawing, hereinafter described, and definitely pointed out in the appended claims.

11:11 the drawing, Figure 1 is a radial section which shows the rim and tire thereon an dlthe means for holdingthe two parts of the rim together, and this figure also shows such rim held upon 'a wheel provided for that purpose; Fig. 2 is a plan view of the rim shown in F igr 1. partly broken away and with the rim retainingidevicesin section; Fig. 3 is a radial section of the rim, andnshows one set ofmeans carried by the rim for holding the two parts of the rim together, and for holding'theirim onthe wheel. :Fig. 4 isi=an outside view of one of the rim clamps;.Fig.. 5'is a. sideview of one of the bridge plates F 6. is an outside View of a part of awheel rim with the demountable EI'iIIl secured thereon and the means=provided for that purpose; Fig. 7 is a side view of part ofthedemountable rim when separate from the wheel; Fig. 8 is a plan view of .a.part of the rim shown iniFi g. 9; Fig. 9 is a: radial section of a differentispecific embodiment of the generic invention; Fig.:1*0 is a plan view of apart of one rim section and of the bridge piece attached thereto; Fig. ll is a radial section of another specific embodiment of the .generic invention; amdFig. 12 is a radial section of another specific embodiment of the invention; Fig. 13:is a radial section of an other specific embodiment of the invention; and Fig. 14 is a side view ofthe clamp shown in F 13.

ilteferring for the time being to that embodiment of the invention shown on Sheet 1, 40 representsithe =felly of an ordinary automobile wheel; .41 thcmetal felly band fitted and secured thereon, and provided along its inner edge with an outwardly extended rim clamping flange 4:2. This felly band is also provided along its outer edge with a flange 43 which extends inward, i. (1., toward the center of the wheel and iies in contact with the outer face of the folly.

The rim 10 is composed of-two circumferentially separable cylindrical sections 10, 10", each of which is provided with an outwardly extended tire holding flange '10". The shape of these flanges may be varied at'will to adapt the rim for use with any particular kind of a pneumatic tire. As shown, the rim is what is known as a straight side rim, constructed to vhold straight side pneumatic tire casing 50. The inner tube of such a tire is indicated by- 51.

Thctworim sections are connected together at intervalswby the bridge, platesQO ofwhich there may be any desired number, preferably about 7. These bridge,plates and their associated parts are alike, and therefore a description of one will answer for all. Each bridge plateis riveted to the inner peripheral surface of the inner rim section 10?, and it extends under and in contact with the inner periphery of the outerrim section 10. This bridge plate is formed at its outer end with an arm 21 which extends radially toward the axis of the rim alongside of the. folly. "These bridge plates are or may be of such thickness that when the rim embraces the wheel they will have a free sliding fit on the outer periphery of the felly-band.

30 represents a rim clamp. This is mount ed to slide radially upon the clamping arm 21 and to occupy, as desired, the operative position shown in Fig. 1.in which its outer end or,ja.w is engaging the front side of the flange 10 of the outer rim section '10", or the: inoperative position as indicated by the dotted linesinFig. 3, wherein its outer end is not in the path of the outer rim section, which. therefore may be separated from the inner rim section. This clamp is held against radial movement away from this operative position by a screw 38 which screws through it and engages with a shoul der 24 on the clamping arm 21. The en gagement between this clamp and the clamping arm, such that the former may move ra dially on the latter may be produced by many well known cmistructions; but since it is desirable to have between the parts a pocket for the reception of the flange 36 on a. nut 35, the construction shown has been devised. In this construction the side edges of the clamp are bent outward,--and the clamp is formed with side flanges which ex tend behind said clamping arm, so as to lie between it and the folly.

\Vithin this pocket is the flange 36 of a nut 35, which nut passes loosely out through a hole 31 in the rim clamp. There is a hole 22 in the clamping arm, and another hole 31 in the back plate of the rim clamp; and these are to enable the passage through of the bolt 4-5 which extends through the l'el| and projects a su'llicienl distance from the outer side thereof. The nut 3!) screws onto this bolt.

When the rim is on the wheel, as shown in Fig. 1, the nut has been screwed upon the bolt against the clamping arm 21. and therc by the rim has been pushed inward over against the rim clamping flange -12. The rim clamp 30 is at this time engaging the side of the flange 10 of the rim section 10", and thereby said rim section is being held in the proper relation to the rim section 10.

If, now, it is desired to remove this rim from the wheel, the nut is turned in the reverse direction. Its flange engages the rim clamp, which, as before stated, has a sliding, guiding engagement with the clamping arm, and thereby the nut by pressing against the clamp 30. pulls the entire rim off the wheel.

When the rim is off the wheel, as shown in Fig. 3, and it is desired to remove the tire therefrom, said tire will of course be deflated, and the screw 38 screwed outward. and this permits the rim clam 30 to be moved radially into the inoperative position shown in Fig. 3 by dotted lines. When all of the clamps have been moved to this position the rim section 10" may be separated from the rim section 10, and then the tire may be removed. While the rim is in this condition another tire may be put on to the rim section 10, and the rim section 10 may be then moved into the position shown, and then the rim clamps 30 are one by one moved radially outward to the operative position shown and the set screw 38 again screwed in.

In the construction shown in Figs. 8 and 9 the bridge plate 50 is riveted to and against the inne periphery of the outer rim section 10 and asses beneath the outer rim section 10* and in contact therewith, and is secured thereto by screws. The bridge plate has clamping arm 51; through which is a circum- In the construction shown in Figs. 10 and 11, the bridge piece 20 is riveted lo the inner rim section ll) and goes under and in con tact with the outer rim section 10 to which it is secured by screws 60. This bridge piece has a clamping arm 21 in which is a hole for the passage of the bolt 45. As sociated with this rim, and in order to secure it upon a wheel, the folly band of the wheel is provided with an inside rim clamping flange .42. Likewise there is n'ovided an ordinary clamp (30 which engages the other side of the outer rim section. The boll passes through a hole in this clamp and the nut 3-? screws onto the boll against the outer face of the clamp.

In the construction shown in Fig. l), the bridge piece 20 is riveted to the outer rim section 10, by means of a rivet (5t, and passes under and in contact with the inner periphcry of the inner rim section 10. A fiat spring (32 is secured to the under side of the bridge plate, by the rivet (31, for exan'iplc, and this spring carries a latch (33 which passes through the bridge plate and into a hole 10 in the inner rim section. The bridge plate is also formed with a clamping arm 21, and it also has an outwardly extending jaw 65 which engages with the outer side of the outer rim section. The fcllv band with the inside clamping flange i2 is preferably used with this form of the invention.

In the construction shown in. Fig. 13, the bridge piece 20 is riveted to the inner rim section and passes under and in contact with the inner periphery of the outer rim section. It is formed with an inwardly turned clamping arm 21. Associated with this clamping arm and adapted to move radially thereon is a clamp 7 O which in its operative position, as shown in Fig. 13, engages the outer side of the outer rim section. The sides of this clamp are turned backward so that they lie close to the sides of the clamping arm 21, and therefore guide the clamp in its radial movements to and from the operative position. There is a radial slot 71 in this clamp. The nut 35 is formed with a cylindrical por tion 38 behind the flange 37. This cylindrical portion 38 passes through the slot 71 and through a hole in the clamping arm 21, and the inner end of the cylindrical portion of the nut is upset to form a flange 39, which engages with the back face of the clamping arm 21. The nut may turn freely in the clamping arm and clamp as it is being screwed onto the bolt. The flange 37 engaging the clamp will push it rearward and Sill cause it to clan'ip against the outer face of the outer rim section when said clamp is in operative position. This clamp will likewise push against the arm 21, whereby the rim will be properly positioned and held on the wheel. The clamp is held in this operative position by a spring 73 which may be formed upon the lower end of the clamping arm 21. This spring goes beneath the lower end of the clamp. By pushing this spring back, the clamp may be moved radially toward the axis of the wheel, and far enough to get it out of the path of the outer rim section, which may therefore be removed.

Having thus described my invention, what I claim is:

1. A demountable tire carrying wheel rim. cmnprising two circumferentially separable rim sections, a plurality of bridge plates each connected to the inner periphery of the inner rim section and passing under and in contact with the inner periphery of the outer rim section, and each having an arm which extends to ard the axis of the rim and having a hole for the passage of a rim retaining bolt, a clamp slidably supported upon said arm and movable away from the axis of the wheel and into engagement with the inner rim section or away from the axis of the wheel out of the path of said outer rim section, and means to hold said clamp in operative position.

2. A demouutable tire carrying wheel rim comprising two circumferentially separable rim sections, a plurality of bridge plates each connected to the inner periphery of the inner rim section and passing under and in contact with the inner periphery of the outer rim section, and each having an arm which extends toward the axis of the rim and having a hole for the passage of a rim retaining bolt, a clamp slidably supported upon said arm and movable away from the axis of the wheel and into engagement with the inner rim section or away from the axis of the wheel out of the path of said outer rim section, means to hold said clamp in operative position, there being between said clamp and clamping arm a pocket and the clamp having a hole through it even with said pocket, and a flanged nut which passes through a hole in said clamp and having in said pocket a flange too large to pass through said hole.

In testimony whereof I hereunto athx my signature.

STElVART R. MeKAY.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents, Washington, D. O. 

